@zlooun/exceljs/dist/es5/csv/line-buffer.js

Fixes the problem with writing a file using streams and not using RAM based on 'exeljs'

"use strict";

function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function"); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, writable: true, configurable: true } }); Object.defineProperty(subClass, "prototype", { writable: false }); if (superClass) _setPrototypeOf(subClass, superClass); }
function _setPrototypeOf(o, p) { _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) { o.__proto__ = p; return o; }; return _setPrototypeOf(o, p); }
function _createSuper(Derived) { var hasNativeReflectConstruct = _isNativeReflectConstruct(); return function _createSuperInternal() { var Super = _getPrototypeOf(Derived), result; if (hasNativeReflectConstruct) { var NewTarget = _getPrototypeOf(this).constructor; result = Reflect.construct(Super, arguments, NewTarget); } else { result = Super.apply(this, arguments); } return _possibleConstructorReturn(this, result); }; }
function _possibleConstructorReturn(self, call) { if (call && (_typeof(call) === "object" || typeof call === "function")) { return call; } else if (call !== void 0) { throw new TypeError("Derived constructors may only return object or undefined"); } return _assertThisInitialized(self); }
function _assertThisInitialized(self) { if (self === void 0) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return self; }
function _isNativeReflectConstruct() { if (typeof Reflect === "undefined" || !Reflect.construct) return false; if (Reflect.construct.sham) return false; if (typeof Proxy === "function") return true; try { Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {})); return true; } catch (e) { return false; } }
function _getPrototypeOf(o) { _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) { return o.__proto__ || Object.getPrototypeOf(o); }; return _getPrototypeOf(o); }
var _require = require('events'),
  EventEmitter = _require.EventEmitter;
var LineBuffer = /*#__PURE__*/function (_EventEmitter) {
  _inherits(LineBuffer, _EventEmitter);
  var _super = _createSuper(LineBuffer);
  function LineBuffer(options) {
    var _this;
    _classCallCheck(this, LineBuffer);
    _this = _super.call(this);
    _this.encoding = options.encoding;
    _this.buffer = null;

    // part of cork/uncork
    _this.corked = false;
    _this.queue = [];
    return _this;
  }

  // Events:
  //  line: here is a line
  //  done: all lines emitted
  _createClass(LineBuffer, [{
    key: "write",
    value: function write(chunk) {
      // find line or lines in chunk and emit them if not corked
      // or queue them if corked
      var data = this.buffer ? this.buffer + chunk : chunk;
      var lines = data.split(/\r?\n/g);

      // save the last line
      this.buffer = lines.pop();
      lines.forEach(function (line) {
        if (this.corked) {
          this.queue.push(line);
        } else {
          this.emit('line', line);
        }
      });
      return !this.corked;
    }
  }, {
    key: "cork",
    value: function cork() {
      this.corked = true;
    }
  }, {
    key: "uncork",
    value: function uncork() {
      this.corked = false;
      this._flush();

      // tell the source I'm ready again
      this.emit('drain');
    }
  }, {
    key: "setDefaultEncoding",
    value: function setDefaultEncoding() {
      // ?
    }
  }, {
    key: "end",
    value: function end() {
      if (this.buffer) {
        this.emit('line', this.buffer);
        this.buffer = null;
      }
      this.emit('done');
    }
  }, {
    key: "_flush",
    value: function _flush() {
      var _this2 = this;
      if (!this.corked) {
        this.queue.forEach(function (line) {
          _this2.emit('line', line);
        });
        this.queue = [];
      }
    }
  }]);
  return LineBuffer;
}(EventEmitter);
module.exports = LineBuffer;
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